<!DOCTYPE html>
<html lang="en">

<head>
  <meta charset="UTF-8">
  <meta http-equiv="X-UA-Compatible" content="IE=edge">
  <meta name="viewport" content="width=device-width, initial-scale=1.0">
  <title>ajax访问web模板项目</title>
</head>

<body>

  <input type="text" id="txtEcho" placeholder="echo消息">
  <button id="btnEcho">发送</button>
  
  <pre id="preResult"></pre>

  <script src="./js/test01.js" type="module"></script>

</body>

</html>